Unit Three: External Ear Disease Diagnosis - Four conditions of the external ear including external otitis, canal and tympanic membrane trauma, and impacted cerumen are covered in this section. External otitis pertains to all the inflammatory processes that change the continuity of the epithelium of the external auditory canal, meatus, and tympanic membrane skin. There are at least four types of external otitis: Bacterial, Fungal, Eczematoid and Viral.

External otitis: Bacterial

External otitis: Fungal

External otitis: Eczematoid

Herpes Zoster Oticus: Viral

Canal Trauma

Impacted Cerumen

Unit Four: Middle Ear Disease Diagnosis - Middle ear diseases are usually seen in the changes of the tympanic membrane, or through the transparent tympanic membrane. The commonest conditions are shown here.

Bullous Myringitis

Acute otitis media

Serous Otitis Acute and Chronic

Tympanosclerosis

Aural Polyp

Retraction Pocket

Adhesive Otitis

Cholesteatoma

Barotrauma

Unit Five: Tympanic Membrane Perforations - A perforation is a hole in the tympanic membrane that is visible through the otoscope. This section contains information on acute traumatic, central, marginal, attic, and total perforations along with information on the monomeric tympanic membrane.